Connection terminals

Cu-wire or Cu-strand with ferrule

1 x 0.6...2.5 mm2 (14...19 AWG)

2 x 0.6...1.0 mm2 (17...19 AWG)

Cu-strand without ferrule

1 x 0.6...2.5 mm2 (14...19 AWG)

2 x 0.6...1.5 mm2 (16...19 AWG)

Stripping length

7...8 mm (0.28...0.31 in)

Screws

M2.5, tightening torque 0.5 Nm (0.37 lb-ft)

Max. cable length

  • Communication cable length1) 2) 3):
    • 300 m (1000 ft) (without repeaters)
    • 1000 m (3300 ft) (with repeaters)
  • Resistance-type analog input cable length: 30 m (100 ft)
  • Digital input, analog input (non-resistance type), and analog output cable length: 100 m (330 ft)

1)

It is recommended to use 3-wire EIA-485 shielded twisted-pair cables with a characteristic impedance of 100...130 Ω, a capacitance of < 100 pF/m between the wires and < 200 pF/m between the wires and the shield.

2)

The shield of the shielded twisted-pair cable must be connected to building earth in the mounting panel at one end to ensure that there is no large voltage difference between the reference grounds.

3)

In case of long distance and/or high baud rate or EMC, consider end-of-line 120-Ohm resistors on both sides (according to RS485 rules) and add isolated repeaters.

4)

Be aware that the cable resistance and the influence of EMC as well as the hum increases with the length of the cable and has an impact on the accuracy of the analogue value. If the maximum cable length can be reached in an application depends on factors like selection of cable type, dimension, shielding, wiring, distance to high power devices, the requirements regarding measurement and control accuracy etc. and is in the responsibility of the customer.